Adjusting the shelf heights was a breeze and I foresee cleaning as an easy task. Take it apart, throw it in the top rack of the dishwasher, or in a sink of hot soapy water, let it dry, put it back together. Easy.
It's a little rickety but still I expect it to hold together for a great long while. At least until the O rings dry out and get brittle. Silicon caulking or a tiny hair band or even the bands people use on braces might do the trick. The caulking would mean a permanent configuration and even if it was clear it probably would look a bit ratchet. I'm sure there are O rings aplenty at the hardware store that would work as replacements.
It turns smoothly enough on the ball bearings. I can see the potential dust getting into the ball bearing area in the future to cause a rougher pivot, but I've been wrong before, and it may be encased well enough to remain dust free.